$\begin{array}{c}3240:120=27\\ \underset{‾}{-240}\\ 840\\ \underset{‾}{-840}\\ 0\\ \end{array}\backslash def\backslash arraystretch\{1.25\}\; \backslash begin\{array\}\{l\}\backslash ;\backslash ;\backslash ;3240:120=27\backslash \backslash \backslash underline\{-240\}\backslash \backslash \backslash ;\backslash ;\backslash ;\backslash ;\backslash ;840\backslash \backslash \backslash ;\backslash ;\backslash underline\{-840\}\backslash \backslash \backslash ;\backslash ;\backslash ;\backslash ;\backslash ;\backslash ;\backslash ;\backslash ;0\backslash \backslash \backslash ;\backslash ;\backslash end\{array\}$

${10}^3+{10}^2=1000+100=110010^3+10^2=1000+100=1100$